HP 20B - Manual (Page 66)

Errors
66
Table 11-1 Error Messages
Error Message Status
ER: Many Solutions Returned when there are many solutions to the
problem.
ER: Invalid N Returned by TVM/Amort if N is invalid.
ER: User Abort Returned by long functions if user stops the calculation
prior to completion.
ER:
∞
Result Returned if the result is infinite.
ER: Insufficient Data Returned by statistics functions if there is insufficient
data for analysis.
ER: No Payback Returned by payback function if there is no payback on
this problem.
ER: Unique solution to IRR Not Found Returned if IRR tries to calculate a solution but cannot
find it. User should supply a new guess…
ER: Stack Stack overflow when performing calculations with more
than 12 pending operations.
ER: Parenthesis: An error linked to use of parentheses: unmatched, too
many, etc.
ER: Insufficient Memory Insufficient memory to complete the operation.
ER: No Solution Found No solution found.